Electric joint



may 25,1925. 1,585,800

E. THEDINGA ELECTRIC JOINT Filed March 24, 1924 A [for n a 1 Patented May 25, 1926.

UNITED STATES EDDO THEDINGA, BERLIN, GERMANY.

ELEc'rmc and.

Application filed March 24, 1924. Serial No. 701,428.

- My invention relates to improvements in electric joints, and more particularly in joints of the type in which an insulating body provided with a screwing clamping member is formed with a hole for the passage of a flexible conductor therethrough, which conductor is adapted to be passed through an eccentric bore of the clamping member for being turned around when screwing down the clamping member. In constructions of this type such as have heretofore been proposed the hole for passing the conductor through the body is made in a metallic disk fitted in a socket of the body and carrying a screw-th eaded pin having the clamping member scr wing thereon. The object of the improvements is to provide a joint of the type referred to which can be manufactured at low cost, and which is solid in construction. \Vith this object in view my invention consists in providing the insulating body with two narrow holes located beside each other and one receiving the clamping device and the other the flexible conductor. By thus, disposing the hole receivin the conductor separate from the clamping device the latter is reduced in dimension, so that only a small hole or socket need be provided in the insulating body for holding the clamping device.

In order that my invention be more clearly understood two examples embodying the same have been shown in the accompanying drawing in which the same letters of reference have been used in all the views to indicate corresponding parts. In said drawing,

Fig. 1, is a sectional elevation showing the joint, and j Fig. 2, is a plan view of Fig. 1 in which one of the clamping members and the nut of the other one have been removed. V

In Figs. 1 and 2 I have illustrated a wall plug. As shown the said plug shows an insulating body a formed wlth two sockets or holes I) each having a' metallic pin a cemented or otherwise fixed therein, which pins are screw-threaded at their bottom arts up to a point a suitable distance away mm the top face of the body a. .The screw-threaded portions of the pin have milled nuts d screwing thereon. At the side of eachof the socketsbthe body a shows a hole e which passes entirely through the body a. The nuts (I are provided each with an eccentric bore 7 adapted to be brought into alignment with the holes 0. The top face of the body a shows com paratively shallow sockets '9 corresponding in diameter to the nuts d. The relative positions of the holes I), e and 9 appears from Fig. 2 in which one of the screws 0 has been removed.

In the use of the joint the nuts cl are is shown at the left in Fig. 1, the walls of Y the bores f providing shoulders engaging the sides of the conductors for bending the same, and finally the ends of the conductors are engaged by the bottom faces of the nuts and clamped between the same and the top face of the body a and more particularly the bottoms of the sockets g.

By passing the conductors h through holes a made in the body a and separate of the clamping device a a joint is produced which can be manufactured at low cost and which is solid in construction. In the construction heretofore proposed in which the hole for the passage of the conductor is made in a metal disk carrying the pin a the disk must be fixed in a socket of the insulating body which requires much work and does. not result in a solid construction. In my improved construction the pin 0 is directly fixed in a hole of the insulating body in a simple and reliable way.

I claim:

An electric plug, comprising an insulating body formed with two holes located beside each other, one "of said holes extending entirely through the insulating body and being adapted to have a flexible conductor passed therethrough, a screw-threaded pin fixed within the other one of said holes, a clamping nut screwed on said pinand formed with an eccentric shoulder in position for acting on the side of a flexible conductor passed through said hole extending entirely through the insulating body, the portion of said pin projecting through said nut being formed for being vfitted in a metallic socket and making electric contact therewith.

.In testimony whereof I hereunto aflix my signature.

EDDO THEDINGA. 

